Please use the Edit button on every post to add info to a recent post, instead of double posting.
Paine is with the other Gullwings, Yuna and Rikku. She's never not with them.
Oh, I misread your question. Paine is a character in Final Fantasy X-2, one of the Gullwings along with Rikku and Yuna. (The two other playable characters, although International has alot more.) She's not in Final Fantasy X, however.